Island



Jan. 27, 1931. J. LAWSON ET AL 1,790,623

MECHANISM FOR EPFECTING REVERSE PLATING Original Filed March 3, 1927 2 Sheets-Sheet 1 6 I 2722a 2230 as efohii/Lawson, Robe rZHLaWsoW Jan. 27, 1931. J. LAWSON ET AL 1,790,623

MECHANISM FOR EFFECTING REVERSE PLATING Original Filed March 3, 1927 2 Sheets-Sheet Patented Jan. 27, 19 31 UNITED STATES PATENT OFFICE JOHN LAWSON AND ROBERT H. LAWSON, OF PAWTUCKET, RHODE ISLAND, ASSIGNORS TO HEMPHILL COMPANY, OF CENTRAL FALLS, RHODE ISLAND, A CORPORATION OF MASSACHUSETTS MECHANISM FOR EFFECI'ING REVERSE PLATING Original application filed March 3, 1927, Serial No. 172,331. Divided and this application filed January This application is a division of our copending application Serial No. 172,331 filed March 3, 1927.

This invention relates to mechanism for effecting reverse plating by or mainly by the action of casting off or like mechanism.

In order that the principle of the invention may be readily understood, we have'disclosed one embodiment of the mechanism and instrumentalities whereby the invention may he practised.

In the drawings:

Fig. l'is a plan view of the sinker or web holder ring and showing in horizontal section the cams of the sinker cam ring, the top plate of said ring being removed, the parts eing positioned for effecting reverse platin iFig. 2 is a similar view but with the parts positioned for normal plating;

Fig. 3 represents in side elevation seven different positions of a special web holder or sinker used in effecting reverseplating; and

Fig. 4 represents a needle and the yarns or threads in several positions in effecting reverse plating. r

In the United States patent to Robert H. Lawson, No. 1,605,895, dated November 2, 1926, Reissue No. 16,584, dated April 5, 1927, there are disclosed means for eflecting reverse plating by the action of casting off mechanism, whereby lengthwise extending stripes may be formed in hosiery or other knitted fabrics. In the United States patent to Robert H. Lawson, No. 1,605,896. dated Novemher 2, 1926, there is disclosedm'eans for-cffecting reverse plating through the action of casting oft mechanism, the transverse movements thereof are selectively governed, whereby agreat variety of patterns may be provided.

In the present application means are disclosed constituting improvements on the mechanism shown in both of said patents. The mechanism shown in Figs. 1 and 2 hereof is particularly adapted for use in connection with any form of means selectively governi the transverse movements of the casting 0 .mechanism or of the instrumentalities Serial No. 330,998.

ence is made. to that patent for a, full (lisclosure of said disks and their manner of operation in selectively positioning the special instrumentalities for movement'transversely of the needles.

Referring more particularly to Figs. 1 and 2, the web holder bed ring is indicated at 1, it having radial or transversely extending grooves 2 for receiving the regular web holders indicated at 3 in Fig. 2, and also for receiving the special instrumentalities indicated at 4 in said figures. The sinker cam ring, the top plate whereof has been removed. from Figs. 1 and 2, is provided with a series of cams providing different pathways, in the inner one of which the regular web holders and in the two outer ones of which the special instrumentalities are guided, depending upon whether normal or reverse plating is being effected. The cam constructions shown in Figs. 1 and 2 are identical, it being understood that in Fig. l are shown or indicated the position and movements of the regular web holders and special instrumentalities in effecting reverse plating, whereas in Fig. 2 are shown or indicated the positions and movements of the parts in effecting normal plating.

As shown in Figs. 1 and 2, we provide an' outer cam 5 of general segmental form and extending from the vertically movable, inclined cam 6, which is similar to and is operated in the same manner as the cam edge 72 of the patent to Lawson No. 1,605,896. The purpose of the said cam 6 is to move all the special instrumentalities into the outer path- Wflfi.

adially within the segmental cam 5 is a somewhat similar cam 7 sulficieutly spaced from the cam 5 to provide a pathway wherein may be received the butts of the special instrumentalities in efi'ecting reverse plating. Radially inside the cam 7 is provided a pathway wherein at all times the butts of the regular web holders or sinkers 3 ride, it being understood that the special instrumentalities 4 are of greater length than the regular sinkers or web holders 3, as clearly shown in Figs. 1 and 2. \Vhen the cam 6 is elevated, the special instrumentalities may ride into the pathway between the cams 5 and 7. The cam 7 may extend in substantially annular form entirely about the circle of needles excepting for the separate cams shown at 8 and 9 in Figs. 1 and 2. Radially outside of the separate cam 9 is a cam 10 between which and the cam 9 the butts of the special instru mentalities ride. The cam 7 at the end thereof nearest the cam 8 is shaped as indicated at 11 to effect radially outward movement of the regular web holders.

The segmental cam 5 is provided with an inwardly sloping or inwardly extending end part 12, the purpose of which is to move the special instrumentalities radially inward at an earlier point circumferentially considered, or, in other words, at an earlier point in the stitch forming operation, than the regular web holders are moved inward at or near the casting off point.

The purpose of this action is substantially that described in said Lawson Patent No. 1,605,895, now Reissue No. 16,584. Slightly circumferentially beyond the point where the special instrumentalities are so moved inward, that is, to the left thereof viewing Fig. 1, the inner edge of the cam 9 is sloped inward as indicated at 13, such slope terminating in the point 14, circumferentially beyond which the edge of the cam 9 slopes again outwardly as indicated at 15. The purpose of the slope 13 up to the point 14 is to force the regular web holders inwardly in the regular stitch forming operation.

Assuming that the inclined cam 6 has been elevated, the disks or other selective mechanism, one type whereof is shown in the said Lawson Patent No. 1,605,896, move into the pathway between the segmental cams 5 and 7, the butts 16 of those special iustrumentalities 4 which are thus selected, the other special instrumentalities 4 remaining in the pathway radially outside of the'cam In the continued movement of the parts, the said selected special instrumentalities 4 are projected inwardby the inclined edge 12, hereinbefore referred to, and very shortly thereafter the regular web holders or sinkers 3, whose butts 17 ride in the inner pathway radially inside of the cam 7, are also projected inward.

The result is to effect reverse plating by reason of such inward or transverse move ment of the special instrumentalities 4.

Referring to that form of special instrumentality 34 shown in Fig. 3, it will be noted that the upper nib 43 thereof is notched at its forward face as clearly shown at 44, providing inclined edges 45, 46, and points 47, 48. Above the point 47 is an inclined edge 49.

The two threads fed in a plating relation are indicated at 50, 51, and in normal plating the black thread 50 appears at the inner face of the fabric and the white thread 51, to which tension or the greatertension is imparted, appears in normal plating at the outer face of the fabric. Such tension may be imparted in any suitable manner, as, for example, by the means shown. at Fig. 30 in the said Lawson Patent No. 1,605,895.

In Fig. 3 are represented seven positions of the special instrumentality 34, and in Fig. 4 are represented the adjacent needle 52 and the two threads 50, 51 which are formed into a reversely plated loop. As clearly shown in the several positions of the special instrunientality 34, the two threads are both engaged by the forward edge of the upper nib 43 and pushed or pressed inwardly during the downward descent of the needle and at the same time the two threads are acted upon in accordance with the general disclosure of the patent to Lawson No. 1,605,895, although herein a different yarn engagement is effected by the special instrumentalities. The form of special instrument-ality here shown differs from that shown in said patent at Fig. 25 and elsewhere, however, mainly by reason of the notch 44 in the forward edge of said upper nib 34. y

In the action of the said special instrumentalities 34 the white yarn 51, to which the greater tension is imparted, is the first to enter the notch 53, and therefore the black thread 50 becomes reversed in position with respect to the white thread 51 and in reverse plating said black thread 50 appears at the outside of the fabric. One purpose of the notch 44 is to procure a greater control of the upper thread 50 which enters therein as shown in the third and fourth positions in Fig. 3, it being, of course, withdrawn there-- from in the subsequent further downward movement of the needle, as shown in the fifth position.

\Ve have not herein represented the cam means outside the sinker cam ring for positioning special instrumentalities for movement transversely of the needles in effecting reverse plating, but it is to be understood that said cam means may be those shown in the parent applicaiton hereof, it being unnecessary to illustrate the same in this application, which is more particularly directed to the instrumentalities which are operated upon by the cam and other mechanism.

iltl

The number of special cams employed may be varied as desired, and if but a single special cam moving in the same horizontal plane be employed, all the butts of the special instrumentalities are of the same length. If, however, two or more such special cams are employed, or if the single special cam itself be selected through being caused to operate in two or more horizontal planes by pattern means, the butts of the special instrumentalities will contrast among-themselves according to the number of the said s ial cams or according to the horizontal p anes of operation of such single special cams. For example, if there be two special cams one overlying the other, the lower of said special cams will act upon the lower butts and the overlying special cam will act upon the longer butts. The provision of contrasting butts among the special instrumentalities is disclosed in the Robert H. Lawson Patent No. 1,605,895, Reissue No. 16,584.

Having thus described one illustrative embodiment of the invention, it is to be under stood that although specific terms are employed, they are used in a generic and descriptive sense and not for purposes of limitation, the scope of the invention being set forth in the following claims.

We claim:

1. Mechanism for effecting plating and reverse plating in a knitted fabric including a series of independent needles. thread engaging instrumentalities for each needle respectively and including special instrumentalities where reverse plating is to be formed, said instrumentalities being movable individually transversely of the needle series, each of said instrumentalities having its upper nib provided with a forward edge to engage and press both threads during the loop forming operation in reverse plating. said forward edge having a notch adapted momentarily to receive one of said threads.

2. Mechanism for effecting plating and reverse plating in a knitted fabric including a series of independent needles, thread engaging instrumentalities for each needle respectively and including special instrumentalities where reverse plating is to be formed, said instrumentalities being movable individually transversely of the needle series, each of said instrumentalities having its upper nib provided with a forward edge to engage and press both threads during the loop forming operation in reverse plating, said forward edge having a notch adapted monicntarily to receive one of said threads, said forward edge above and below said notch being oppositely tapered.

3. Mechanism for effecting plating and reverse plating in a knitted fabric including a series of independent needles, thread engaging instrumentalities for each needle re spectively and including special instrumentalities where reverse plating is to be formed, said instrumentalities being movable individually transversely of the needle series, each of said instrumentalities having its upper nib provided with a forward edge to engage-and press both threads during the loop forming operation in reverse plating, sai forward edge having a notch adapted momentarily to receive one of said threads, whereby thread separation is effected in reverse plating.

4. Mechanism for effecting plating and reverse plating in a knitted fabric including a series of independent needles, thread engaging instrumentalities for each needle respectively and including special instrnmentalities where reverse plating is to be formed, said instrumentalities being movable individually transversely of the needle series, each of said instrumentalities having its upper nib provided with a forward edge to en gage and press both threads during the loop forming operation in reverse plating, said forward edge having a notch adapted m0- mentarily to receive one of said threads, and means governing the transverse movement of said special instrumentalities to cause them to act at an earlier point than the other thread engaging instrumentalities, thereby to move at least one of said threads transversely with respect to the needle series in reverse plating.

5. In mechanism for effectin platin and reverse plating upon indepen ent knitting needles and in which two threads are introduced in plating relation, one or more special thread en aging instrumentalities movable transversely to the needle series, such instrumentality or instrumentalities each having its upper nib (provided with a forward ed e to engage an press both yarns during t e loop forming operation in reverse plating, said forward edge having a notch adapted momentarily to receive one of the threads.

In testimony whereof, we have signed our names to this specification.

JOHN LAWSON. ROBERT H. LAWSON. 

